Netafim Techline EZ 12mm Combination Tee (Ins x Ins x 3/4" FPT)

A quick guide to correctly installing your combination tee adapter for a leak-proof seal.

Step 1: Tape the Male Threads
Wrap the 3/4-inch Male Pipe Thread (MPT) of your PVC riser or manifold with 2 to 3 layers of thread sealant tape. Never use liquid pipe dope on plastic irrigation fittings.

Step 2: Thread the Fitting
Hand-tighten the FPT center branch of the Netafim Combination Tee onto your taped PVC riser. Do not over-tighten with a wrench, as this can crack the plastic body of the tee.

Step 3: Cut the Tubing
Using a pair of tubing cutters, make a clean, straight 90-degree cut on your 12mm Netafim Techline EZ tubing. Avoid using jagged scissors, which can cause leaks around the barbs.

Step 4: Push the Tubing On
Firmly grasp the tubing and push it straight over the barbed ends of the tee adapter. Rock it slightly side to side until the tubing slides completely over the barb and sits flush against the center stop.

During spring startup, how do I check the Netafim 12mm Combination Tee for freeze damage?
During spring startup, pressurize your system and inspect the FPT threaded center of the Netafim 12mm Combination Tee. Freezing water can crack rigid plastic threads, requiring the tee to be replaced.

If the plastic is not cracked but you notice a slight drip at the thread connection, you may just need to unscrew it and apply fresh thread sealant tape before re-tightening.

Will standard 1/2-inch tubing fit the barbed ends of the Netafim 12mm Combination Tee?
No, standard 1/2-inch poly tubing is too large for the Netafim 12mm Combination Tee. This tee is designed exclusively for 12mm tubing with a 0.426-inch inside diameter and will leak with larger tubing.

Standard 1/2" tubing typically has a 0.600" ID. Always match your fittings to your tubing's inside diameter to prevent blowouts under pressure.

Do I need to use thread sealant tape on the Netafim 12mm Combination Tee?
Yes, you should apply two to three wraps of thread sealant tape to the male PVC threads before screwing the Netafim 12mm Combination Tee onto them. Do not use pipe dope.

Thread sealant tape fills the tiny gaps in the plastic threads to prevent weeping. Apply it clockwise to match the direction you will be turning the fitting.

Does the Netafim 12mm Combination Tee require hose clamps?
No, hose clamps are not required. The sharp barbs on the Netafim 12mm Combination Tee create a secure grip inside the 12mm tubing that holds water effectively up to 50 PSI.

As long as you are using the correct 12mm tubing and your system is pressure-regulated below the 50 PSI maximum, the friction fit is permanent and watertight.